More and more Britons are heading out to the Middle East for terrorist training in groundwork for attacks in the wake of the Arab Spring, the head of MI5 has said.

Director-general of the Security Service,Jonathan Evans,advised that parts of the Arab world were becoming a more liberal and tolerant environment for al-Qaeda and Britons were going there to “seek training and opportunities for militant activity”.

Some will return to the mainland and pose a significant threat and the state of affairs“could get worse as events unfold”,he said.

It is thought that up to 200 ‘so called’British residents and nationals are presently in the Arab world and either mixed up in training camps, being radicalised or actively functional within the terror groups.

In an uncommon public speech only weeks before the Olympic Games begin in London,Mr Evans said the Arab world was in “radical transition”.

“Today parts of the Arab world have once more become a permissive environment for al-Qaeda,”he said.“A small number of British would be jihadis are also making their way to Arab countries to seek training and opportunities for militant activity, as they do in Somalia and Yemen.

“Some will return to the UK and pose a threat here.“This is a new and worrying development and could get worse as events unfold.
“So we will have to manage the short-term risks if there is to be a longer-term reward from the Arab Spring.”

Countries such as Yemen, Libya, Nigeria and Egypt are all understood to pose a serious risk.

Speaking in central London, his first public speech in over 18 months,Mr Evans said Britain had experienced a “credible terrorist attack plot about once a year since 9/11”.

Despite the notions in some quarters that,with terror warlord Osama bin Laden gone to the sharks and al-Qa'ida's senior leadership under serious pressure in Pakistan,the terrorist threat to the UK has evaporated, in reality it will outlast the Olympics,he said.

“In back rooms and in cars and on the streets of this country there is no shortage of individuals talking about wanting to mount terrorist attacks here,”he added.

The threat is real and remains with us today.“But we do see a changing shape of the threat internationally.

“We appear to be moving from a period of a deep and focused threat to one where the threat is less monolithic but wider.”
Mr Evans also gave caution to the incredible scale of cyber attacks,“with industrial-scale processes involving many thousands of people lying behind both state-sponsored cyber espionage and organised cyber crime”.

One company registered on the London Stock Exchange assessed it has lost some £800 million as an outcome of a hostile state-sponsored cyber attack,he said.

MI5 is also scrutinising possible attacks in more than a dozen other firms,as well as watching others who may be targets in the future.

He said:“So far,established terrorist groups have not posed a significant threat in this medium,but they are aware of the potential to use cyber vulnerabilities to attack critical infrastructure and I would expect them to gain more capability to do so in future.”

He stressed company boards must consider the weaknesses within their own companies.

Mr Evans continued and added that the economic predicament in the eurozone could also lead to the rise of political extremism, but noted that the British have been “stolidly unimpressed”by this in the past.

“I suspect that any problems we may have here will come from lone actors attracted to extremism and violence rather than an organised political movement,”he said.

But last year's attacks in Norway showed “how devastating a single individual can be if sufficiently determined and callous”,he said.